Virchow stated that cells arise from pre-existing cells.
A. True
B. False

Answer

To determine whether the statement "Virchow stated that cells arise from pre-existing cells" is true or false, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Statement**: The statement claims that Rudolf Virchow proposed that cells come from existing cells.

2. **Historical Context**: Rudolf Virchow is known for his contributions to the cell theory. He is particularly noted for modifying the original cell theory.

3. **Original Cell Theory**: The original cell theory, proposed by Schleiden and Schwann, stated that all living organisms are composed of cells, and that the cell is the basic unit of life.

4. **Virchow's Contribution**: Virchow added a crucial point to this theory, which is often summarized as "Omnis cellula e cellula," meaning "all cells come from cells." This statement emphasizes that new cells are produced from the division of existing cells.

5. **Conclusion**: Since Virchow indeed stated that cells arise from pre-existing cells, the statement in the question is true.

6. **Final Answer**: Therefore, the correct answer is **A. True**.